When a router has routes to the same destination What technique is used first to determine what route to take?
Given two separate routes to the same destination, the router chooses the route with the lowest AD. When a router has the choice of a static route and an EIGRP route, the static route takes precedence. Similarly, a directly connected route with an AD of 0 takes precedence over a static route with an AD of 1.
What is a static route used for?
A static route is a pre-determined pathway that a packet must travel to reach a specific host or network. Some ISPs require static routes to build your routing table instead of using dynamic routing protocols. Static routes do not require CPU resources to exchange routing information with a peer router.
What is static and dynamic routing?
Static routing has a smaller routing table with only one entry for each destination, while dynamic routing requires routers to send out their entire routing tables to identify route availability.
What does route summarization mean?
Route summarization — also known as route aggregation — is a method to minimize the number of routing tables in an IP network. It consolidates selected multiple routes into a single route advertisement. This differentiates it from flat routing, in which every routing table carries a unique entry for each route.
Which routing protocols use route metric to compute the distance to destination?
Interior Gateway Routing Protocol (IGRP) was developed by Cisco to overcome problems with RIP in large networks. IGRP is a distance vector protocol, but uses multiple routing metrics (not just hop count) to determine the distance to the destination.
Which value in a routing table is used to compare routes received from a routing protocol?
The Preference value is used to compare the preferences of different routing protocols, while the Cost value is used to compare the preferences of different routes of the same routing protocol. NextHop: indicates the IP address of the next device that an IP packet passes through.
Where is dynamic routing used?
If you are building a larger or more fluid network, dynamic routing allows routers on the network to make intelligent decisions on which path is best to get data to a subnet/destination. A dynamic routing table is created, maintained, and updated by a routing protocol running on the router.
How does distance vector routing work?
Distance vector routing works as follows. Each router maintains a routing table. Each entry of the table contains a specific destination, a metric (the shortest distance to the destination), and the next hop on the shortest path from the current router to the destination.
What tcpdump command can be used to filter out all traffic except SSH traffic?
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| Question | Answer |
|---|---|
| What tcpdump command can be used to filter out all traffic except SSH traffic? | tcpdump port 22 |
| Which command will produce statistics about each message transmitted by a host, separated according to protocol type? | netstat -s |
Which routing protocol is typically used to connect autonomous systems on the Internet?
What routing protocol is typically used to connect autonomous systems (ASs) on the Internet? BGP is used to connect autonomous systems together on the Internet because of its ability to make classless routing and summarization possible. This helps to keep routing tables smaller and more efficient at the ISP core.
How are summary routes calculated?
To calculate the summary route, follow these steps:
- Convert the addresses to binary format and align them in a list.
- Locate the bit where the common pattern of digits ends. (It might be helpful to draw a vertical line marking the last matching bit in the common pattern.)
- Count the number of common bits.
Jun 11, 2004
What is in routing table?
A routing table contains the information necessary to forward a packet along the best path toward its destination. Each packet contains information about its origin and destination.
What is distance vector routing in computer networks?
Distance vector routing is an asynchronous algorithm in which node x sends the copy of its distance vector to all its neighbors. When node x receives the new distance vector from one of its neighboring vector, v, it saves the distance vector of v and uses the Bellman-Ford equation to update its own distance vector.
What is metric route?
A metric is a value that's assigned to an IP route for a particular network interface. It identifies the cost that's associated with using that route. For example, the metric can be valued in terms of link speed, hop count, or time delay.
Which tool records the route between any two hosts on a network and can be used to troubleshoot routing problems Group of answer choices?
Traceroute Traceroute – The traceroute command is used to determine the path between two connections. Often a connection to another device will have to go through multiple routers. The traceroute command will return the names or IP addresses of all the routers between two devices.
What is dynamic routing discuss distance vector routing?
It is a dynamic routing algorithm in which each router computes a distance between itself and each possible destination i.e. its immediate neighbors. The router shares its knowledge about the whole network to its neighbors and accordingly updates the table based on its neighbors.
Which algorithm is used for distance vector routing?
Bellman-Ford algorithm A distance-vector routing protocol uses the Bellman-Ford algorithm to calculate paths. A distance-vector routing protocol requires that a router informs its neighbors of topology changes periodically and, in some cases, when a change is detected in the topology of a network.
What are routing algorithms?
A routing algorithm is a procedure that lays down the route or path to transfer data packets from source to the destination. They help in directing Internet traffic efficiently. After a data packet leaves its source, it can choose among the many different paths to reach its destination.
What is tcpdump used for?
tcpdump is a packet analyzer that is launched from the command line. It can be used to analyze network traffic by intercepting and displaying packets that are being created or received by the computer it's running on.
What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?
What is the purpose of the checksum TCP field? It allows the receiving node to determine whether the TCP segment became corrupted during transmission.
Which of the following routing protocols is a distance-vector routing protocol?
RIP (Routing Information Protocol) is a distance vector routing protocol that uses hop count as its metric.
Which of the following routing protocols is used by routers on the Internet for learning and sharing routes?
RIP is the routing protocol used on the internet. RIP uses hop counts as the cost metric. RIP is a link state routing protocol.
How do you calculate route aggregation?
11:3617:43Route Aggregation/Supernetting for IPv4: Solve with Example – YouTubeYouTube
What is aggregate router?
The aggregate router terminates IP traffic from the RNs and passes it to the RNC. The EMS manages the radio access network with commonly used ISP servers. It includes standard IP servers for the domain name system (DNS), dynamic host configuration protocol (DHCP) and authentication, authorization, and accounting (AAA).
What is router and routing table?
In computer networking, a routing table, or routing information base (RIB), is a data table stored in a router or a network host that lists the routes to particular network destinations, and in some cases, metrics (distances) associated with those routes.
What is distance-vector routing protocol How do you find distance vector routing?
In distance-vector routing (DVR), each router is required to inform the topology changes to its neighboring routers periodically. Historically it is known as the old ARPNET routing algorithm or Bellman-Ford algorithm.
WHAT IS routing table in networking?
A routing table is a set of rules, often viewed in table format, that is used to determine where data packets traveling over an Internet Protocol (IP) network will be directed. All IP-enabled devices, including routers and switches, use routing tables.
What is routing and types of routing?
Routing is a process that is performed by layer 3 (or network layer) devices in order to deliver the packet by choosing an optimal path from one network to another. There are 3 types of routing: 1. Static routing – Static routing is a process in which we have to manually add routes to the routing table.
Which algorithm uses distance vector routing?
Bellman-Ford algorithm A distance-vector routing protocol uses the Bellman-Ford algorithm to calculate paths. A distance-vector routing protocol requires that a router informs its neighbors of topology changes periodically and, in some cases, when a change is detected in the topology of a network.
What is distance vector routing algorithm in computer networks?
Distance vector routing is an asynchronous algorithm in which node x sends the copy of its distance vector to all its neighbors. When node x receives the new distance vector from one of its neighboring vector, v, it saves the distance vector of v and uses the Bellman-Ford equation to update its own distance vector.